17 results about "Hot stage" patented technology

This invention relates to a novel method for preparing lateral 3D / quasi-2D perovskite heterostructures, comprising the following steps: Step S1: Spin-coating a perovskite precursor solution onto a substrate to form a film, followed by annealing and crystallization on a hot stage to form a quasi-two-dimensional perovskite thin film; Step S2: Placing the quasi-two-dimensional perovskite thin film between two metal electrodes, which are respectively used as positive and negative electrodes connected to an external power source to construct an electric field; Step S3: Placing the quasi-two-dimensional perovskite thin film in an electric field strength of 0.1-100 V / μm and subjecting it to light irradiation, causing bulk organic cations (LOCs) to migrate under the simultaneous stimulation of light and electricity, forming a lateral perovskite heterostructure. This invention utilizes the ability of bulk organic cations (LOCs) to migrate under specific conditions and promote the formation of lateral perovskite heterostructures with sharp interfaces, thus obtaining a novel LPHs preparation method different from existing technologies.

The utility model discloses an XY sample displacement adjusting cold and hot table which comprises a cavity and a base, a Y-direction sliding block is installed in the cavity in a sliding mode, an X-direction sliding block is installed on the Y-direction sliding block in a sliding mode, an X-direction adjusting knob for adjusting the X-direction sliding block is installed in the cavity, and a Y-direction adjusting knob for adjusting the Y-direction sliding block is installed in the cavity. The Y-direction sliding block is connected with the displacement adjusting piece through the switching block. A base is installed at the bottom end of the cavity, a flange is installed at one end of the cavity and one end of the base, the flange extends into the cavity, a fixing plate is installed on the flange located in the cavity, insulating ceramic beads are installed on the fixing plate, and a temperature control interface is installed in the middle of the flange. According to the utility model, the upper window cover and the lower window cover are trumpet-shaped, so that a user can adapt to various optical lenses more conveniently; the upper cover is provided with a blowing support, the blowing support is inserted into a blowing pipe to blow the upper surface of the window, and low-temperature frosting is prevented.

A method for improving the nucleation of the γ phase in polyvinylidene fluoride (PVDF), a γ phase PVDF dielectric film based on the nucleation method, and a preparation method thereof are disclosed. The method involves using ceramic powder in the PVDF film material to enhance the nucleation ability of the γ phase crystals, improve the hydrophilicity of the PVDF film, and enhance the high-temperature dielectric properties of the PVDF film material. The dielectric film raw materials include 0-0.2 parts of ceramic powder (NBT), 10 parts of polyvinylidene fluoride (PVDF), and 200-204 parts of N,N-dimethylformamide (DMF). The preparation method is as follows: 1) Using N,N-dimethylformamide... 1) Prepare a 5% ceramic powder / polyvinylidene fluoride solution using amide as a solvent; 2) Drop the solution from step 1) onto a glass slide and cure it into a film in a vacuum oven at 68-72℃; 3) Melt the cured film obtained in step 2) on a hot stage at 200℃-220℃ to eliminate thermal history, and then rapidly cool it to 150-170℃ for isothermal crystallization until the blended film is completely crystallized; The preparation method of the γ-phase polyvinylidene fluoride dielectric film of the present invention is simple, convenient to operate, and has excellent performance, such as high temperature resistance, corrosion resistance, and strong piezoelectricity and ferroelectricity.

A kind of oil-immersed capacitor bidirectional tensile polypropylene electric heating aging experiment system and method, in the method, build electric heating aging experiment cavity, electric heating aging experiment cavity is supported on hot stage, the bottom in electric heating aging experiment cavity is equipped with base support;Wash and dry electric heating aging experiment cavity and BOPP film sample;BOPP film sample is placed in electric heating aging experiment cavity, BOPP film sample is clamped and supported in the base support via ground electrode and high voltage electrode, high voltage electrode and ground electrode are connected to direct current power supply via protection resistance;Electric heating aging experiment cavity is pumped and injects benzyl methyl benzene solution, the BOPP film sample is immersed in the benzyl methyl benzene solution in electric heating aging experiment cavity;Hot stage and direct current power supply are opened, record experiment start time and experimental temperature;After electric heating aging experiment, power off, remove BOPP film sample, BOPP film sample is cleaned with alcohol and then bagged for standby.

The utility model relates to the technical field of cold and hot experiments, and discloses a cold and hot table which comprises a base, a cover plate fixed on the base, a vacuum chamber formed between the base and the cover plate, a window lens fixed inside the upper end of the cover plate, a window gasket fixed on the lower side of the window lens, a sight glass pressing plate fixed on the upper side of the window lens, and a silver table fixed on the base. A plurality of zirconium beads are arranged on the upper side and the lower side of the silver table, a zirconium bead fixing block and a silver table fixing piece which are used for fixing the zirconium beads are fixed in the base, a temperature control flange plate connected with the silver table is installed on one side of the base, a vacuum corrugated pipe communicated with the base is installed on the base, and a polyimide film is installed on the cover plate. The device is convenient to vacuumize, and experimental performance of a sample in a specific gas environment is convenient to research; and stable heating and cooling rates can be provided, and a user is allowed to carry out a rapid heating or slow heat treatment experiment on the material, so that behaviors of the material at different temperature change rates are researched.

The present application relates to the field of two-dimensional material lossless transfer, in particular to a two-dimensional material lossless transfer method assisted by low melting point metal. An organic transfer medium is spin-coated on a two-dimensional material synthesized on the surface of a metal substrate, and a transfer medium / two-dimensional material / metal substrate composite is obtained after heating and curing. The composite is placed on the surface of a liquid metal, and heated with a hot stage. The metal substrate is dissolved by alloying with the liquid metal, and separated from the transfer medium / two-dimensional material. The liquid metal and the transfer medium / two-dimensional material composite are separated, the transfer medium / two-dimensional material composite is transferred to the surface of a target substrate, the transfer medium is removed by organic solvent cleaning, and the two-dimensional material is transferred without damage. The method breaks the dilemma of having to use an oxidizing chemical etchant, and makes the transferred two-dimensional material have a more complete surface and a crystal structure that is not oxidized by chemical reagents, laying a foundation for the intrinsic property research and practical application of two-dimensional materials.

This utility model proposes an adjustable heat insulation cover for a hot-stage microscope, including a base. A microscope mechanism is fixedly installed on the rear side of the base, and a displacement mechanism is fixedly installed on the top rear side of the base. During the application of this technical solution, the heat insulation mechanism and the displacement mechanism work together to allow the heat insulation mechanism to be flexibly adjusted during use, so that the two heat insulation covers can be precisely closed to form a closed space. At the same time, the heat insulation covers, together with heat-insulating silicone pads, can cover the bottom of the microscope body, thereby achieving the effect of reducing heat loss from the operating area in all directions. This solves the problems of high heat loss and temperature susceptibility to environmental interference caused by exposed heating structures in the prior art. It not only allows the heat from the synchronous operation of the main heating wire and the auxiliary heating wire to be efficiently retained, but also maintains the temperature stability of the operating area and avoids the impact of disordered heat diffusion on the activity of experimental samples.

This application provides a method for releasing surface charge on a wafer, comprising: after the wafer is transferred into a high-temperature process chamber, adjusting the wafer's lifting height to a preset preheating height and preheating the wafer, wherein the wafer's lifting height is the relative height between the wafer and the hot stage in the high-temperature process chamber; adjusting the wafer's lifting height to a preset gas filling height and introducing a preset gas into the high-temperature process chamber; turning on the radio frequency device to excite the preset gas to generate plasma; after the radio frequency device has been operating for a preset duration, turning off the radio frequency device and adjusting the wafer's lifting height to 0, thereby releasing the surface unbalanced charge of the wafer by generating plasma, making the wafer electrically neutral to the outside, and solving the problem that the wafer is difficult to release induced charge in a vacuum environment due to the pyroelectric effect, resulting in a strong potential between the wafer and the hot stage, which causes the wafer to be adsorbed on the hot stage, and the wafer pins supporting the wafer are easily broken during the transfer process.

The invention provides a eutectic heating stage clamp and eutectic equipment, the eutectic heating stage clamp comprises a heating stage, a first eutectic part and a second eutectic part, the first eutectic part and the second eutectic part are respectively arranged on the heating stage, the first eutectic part is provided with a first fixing assembly used for fixing a first optical device, and the second eutectic part is provided with a second fixing assembly used for fixing a second optical device. The first optical device is used for fixing the second optical device, and is different from the second optical device. The first eutectic part and the second eutectic part are respectively arranged on the heating stage, the first optical device and the second optical device which are different can be respectively fixed through the first fixing assembly and the second fixing assembly, two different types of optical devices can be compatible, different devices do not need to be used for eutectic, the switching time is shortened, and the switching efficiency is improved. And the compatibility and the production efficiency of single eutectic equipment are improved.

The invention discloses a preparation method of a polycation mixed perovskite device, and the method comprises the following steps: S1, carrying out the ultrasonic cleaning of a conductive substrate, placing the conductive substrate in a drying oven, drying, and treating the dried conductive substrate in an ultraviolet ozone environment; s2, forming an electron transport layer on the conductive layer of the conductive substrate; s3, treating the conductive substrate and the electron transport layer in an air plasma environment, and placing the treated conductive substrate and electron transport layer on a heating stage; s4, filling the perovskite precursor solution into a spray gun; s5, spraying by a spray gun to form a perovskite coating; s6, spraying by the spray gun to continuously form a perovskite coating; s7, repeating the step S6 to enable the perovskite thin film to reach a set thickness; and S8, removing a part of the perovskite thin film and the electron transport layer to expose the conductive layer of the conductive substrate, and depositing a metal electrode layer on the perovskite thin film. According to the invention, high photoelectric conversion efficiency is maintained, and the thermal stability of the perovskite material can be significantly improved.

The invention relates to the technical field of microfluidics, and discloses a micro-fluidic chip experiment cold and hot table device and a micro-fluidic chip experiment method.The micro-fluidic chip experiment cold and hot table device comprises a cold and hot table (1) used for bearing a micro-fluidic chip and a displacement control mechanism (2) used for controlling planar movement of the micro-fluidic chip, the temperature control units are sequentially adjacent in the horizontal direction of the cooling and heating table (1), and the temperatures of the adjacent temperature control units change in a gradient mode so as to control the temperature of the cooling and heating table (1) to change in the gradient mode in the horizontal direction. The internal fluid of the micro-fluidic chip can be at different temperatures at the same time without operating a cold and hot table to integrally heat or cool the chip, so that the research on the fluid flowing condition and the heat transfer rule under different temperature gradients is facilitated, and the experimental temperature can be adjusted according to the temperature required by the experiment. The micro-fluidic chip can be adjusted to be located at different positions of the cold-hot stage through the displacement control mechanism without waiting for temperature conversion of the cold-hot stage, so that the operation is convenient, and the time is saved.

The application belongs to the technical field of heat reflection, and discloses a method and system for testing heat reflection coefficient. The application utilizes a high-precision cold and hot stage to accurately control the surface temperature of a test sample, obtains incident light information and reflected light information based on two detectors, and calculates the heat reflection coefficient of the test sample in a test temperature range in combination with temperature data. The application can measure a heat reflection coefficient with higher accuracy, and the system for testing heat reflection coefficient has simple structure, low cost, convenient operation, high working stability and strong practicability.

The utility model discloses an optical uniform-temperature cooling and heating table which comprises a base, a cover plate is fixedly arranged on the outer side of the base, a decorative plate is arranged in the base, a zirconium bead fixing piece and a silver table fixing block are respectively arranged in the base, the zirconium bead fixing piece and the silver table fixing block are fixedly connected, and the zirconium bead fixing piece is fixedly connected with the silver table fixing block. A temperature control flange plate is fixedly arranged at the top of the base, a liquid nitrogen flange plate is fixedly arranged at the bottom of the base, an upper sight glass pressing plate is arranged on the outer side of the cover plate, and a liquid nitrogen pipe sleeve is fixedly arranged in the temperature control flange plate. The vacuum pump vacuumizes the interior of the base through the corrugated pipe, so that the interior of a cavity of the base is in a vacuum state, the table core is heated through the heating net, the temperature of the table core in the base rises to 600 DEG C, the temperature uniformity of the surface of the table core can be guaranteed through the heating net, the liquid nitrogen pump is started, and liquid nitrogen flows to the table core through the nitrogen conveying pipe; when the temperature of the table core is reduced, the temperature can be controlled to-190 DEG C, and the temperature can be effectively controlled at any temperature point between-190 DEG C and 600 DEG C.

The utility model provides a near-wall bonding auxiliary clamp of a manual wedge bonding machine, an operation surface is arranged at the top of an operation table, a product box is placed on the operation surface, and the operation surface is obliquely arranged from one end close to a welding pin of the wedge bonding machine to one end far away from the welding pin of the wedge bonding machine from low to high; the first locking mechanism is arranged on the operation surface, and the first locking mechanism is used for locking the product box, so that the product box and the operation surface are relatively fixed; and the second locking mechanism is arranged at the bottom of the operation table and is used for fixing the operation table on a heating table of the wedge bonding machine. According to the utility model, the design of the inclined operation surface optimizes the space adaptability of the welding pin and the near-wall area of the product box, so that the near-wall operation can be realized without depending on a special wire clamp or a customized chopper in the bonding process; the first locking mechanism ensures that the product box is stably connected with the operation table, and the second locking mechanism ensures the bonding precision by fixing the relative position of the operation table and the heating table.

The invention discloses a method for preparing a flexible perovskite thin film through a spraying method, and the method comprises the following steps: S1, carrying out the ultrasonic cleaning of a flexible conductive substrate in a cleaning solvent, and placing the cleaned flexible conductive substrate in a drying oven for drying; s2, the spray gun is placed in a drying oven to be dried after being cleaned; s3, after the flexible conductive substrate is subjected to ultraviolet ozone treatment, preparing a charge transport layer on the flexible conductive substrate; s4, after the charge transfer layer is subjected to ultraviolet ozone treatment, the flexible conductive substrate and the charge transfer layer are placed on a heating table together to be heated; s5, filling the perovskite precursor solution into a spray gun; s6, spraying by a spray gun to form a flexible perovskite coating; s7, the spray gun continues spraying to form a flexible perovskite coating; s8, repeating the step S7 to form a flexible perovskite thin film; and S9, nitrogen flow purging and nitrogen spray gun purging are adopted, and finally annealing treatment is performed on the flexible perovskite thin film. The method is controllable in process, high in film forming quality, high in efficiency, high in uniformity and good in mechanical flexibility.

The invention provides a preparation method of a large-area ultrathin perovskite single crystal. The preparation method comprises the following steps: S1, obtaining a perovskite seed crystal; s2, putting the perovskite seed crystal in the step S1 into a first solvent, and heating to carry out heat treatment on the perovskite seed crystal to change a surface microstructure; s3, placing the treated perovskite seed crystal in a glass container, sequentially adding a second solvent and a perovskite precursor growth solution, and placing the glass container on a heating stage to obtain a perovskite single crystal with the thickness of 1-2cm; s4, fixing the perovskite single crystal on a glass sheet by using paraffin, cutting off seed crystals in the perovskite single crystal by using a blade, and thinning the perovskite single crystal to obtain a large-area ultrathin perovskite single crystal wafer; wherein the second solvent in the step S3 is immiscible with the perovskite precursor growth solution, and the density of the second solvent is smaller than that of the perovskite precursor growth solution. The method has the advantages of inhibiting the growth of the crystal in the vertical direction, reducing the carrier recombination rate and reducing the crack and breakage probability.

The invention relates to the technical field of high-temperature material test characterization and additive manufacturing process optimization, and discloses a 3D printing ceramic material sintering performance judgment method based on an ultrahigh-temperature heating stage, which comprises the steps of sample preparation, sample placement, experimental parameter setting, in-situ real-time observation and picture shooting, image analysis and sintering behavior quantitative evaluation. According to the method, continuous in-situ recording of degreasing, shrinkage and densification behaviors in the sintering process of the ceramic material is realized, key sintering processes such as neck formation and pore evolution can be directly represented, and the limitation that only states before and after sintering can be obtained and a sintering dynamic evolution mechanism is difficult to reveal in a traditional technology is broken through; whether a certain ceramic is over-burnt or under-burnt can be judged within ten minutes, so that the trial and error cost is greatly reduced; in addition, height, width and area changes are measured at the same time, and the dilatometer is more comprehensive than a push rod type dilatometer and suitable for complex 3D printed pieces; the temperature rise of the ultrahigh-temperature heating stage is hundreds of times faster than that of a large furnace, the research and development efficiency is remarkably improved, and the device is suitable for various ceramic materials.